LayoutTests/fast/loader/cancel-load-during-port-block-timer.html

<script>
    if (window.layoutTestController) {
        layoutTestController.dumpAsText();
        layoutTestController.waitUntilDone();
        layoutTestController.setCanOpenWindows();
        layoutTestController.setCloseRemainingWindowsWhenComplete();
    }

    window.open("http://webkit.org:22").document.write('');

    if (window.layoutTestController)
        layoutTestController.notifyDone();
</script>
If this does crash, the test has passed.